Improvement in apparatus for heating buildings by compressed air



UNITED STATES PATENT OFFICE THEODORE s. BROOKS, or GARRISON, NEW YORK.

IMPROVEMENT IN APPARATUS FOR HEATING BUILDINGS BY COMPRESSED AIR.

Specification forming part of Letters Patent N0. 214,097, dated April 8,1879; application filed February 13, 1879.

To all whom it may concern:

Be it known that I, THEODORE S. BROOKS, of Garrison, in the county ofPutnam and State of New York, have inventedcertain new and usefulImprovements in Heating Buildin gs by Compressed Air; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itpertains to make and use it, reference being had to the accompanyingdrawings, which form part of this specification.

My invention relates to an improvement in heating buildings bycompressed air; and it consists in compressing the air, by means of asuitable engine, into a receiver, where it is heated both by the exhauststeam from the engine, and by the products of combustion from thefurnace under the steam-boiler, after which the air is superheated bysteam, and then conveyed all over the building by means of pipes, thesame as steam, as will be more fully described hereinafter.

By the use of air instead of steam, a great saving is efi'ected in fueland labor; there will be no leakage of water at the joints of the pipesand stuffing-boxes; there will be no freezing of water in the pipes, andthe constant noise in the heaters will be entirely done away with.

Figure l is a plan view of my invention, partly in section. Fig. 2 is aside elevation of the same, and Fig. 3 is an end view.

a represents an ordinary tubular steam-boiler, under which the fire isbuilt in the furnace b. The products of combustion pass from the furnaceto the rear end of the boiler, and then back through the tubes 0 to thefront end, through the flue d in the brick work, and through a suitablepipe or connection into the large flue e in the receiver f, and thenceup the chimney. After steam is raised in the boiler, it is used to run acompressing-engine of any desired construction for the purpose ofcompressing air to any desired extent in the receiver f. This receiveris also set in suitable brick-work, as shown, and is much larger thanthe boiler beside which it is placed. In this receiver is placed aseries of heatingpipes, g, into which the exhaust steam from theengineis passed through the pipe h. This steam, after passing throughthe heating-pipes g and heating the compressed airin the receiver, inaddition to the heat received from the waste products of combustion,passes out through the pipe '6.

In order to keep the air in the receiver from becoming too dry, a jet oflive steam is kept constantly escaping into the receiver through thepipe j.

Over the top of the boiler, and connected directly thereto by anynumberof suitable pipes, is the superheater Z. In this heater is placed aseries of tubes, that are heated by the live steam from the boiler, andthrough which tubes the com pressed air from the receiver passes on itsway to the building to be heated. The ends of these tubes n are notsecured in the ends of the heater, but in the interior heads, 0, betweenwhich heads 0 and the ends of the heater there is left a suitable space,q, for the purpose of changing the direction of the air as it comes fromthe receiver, and causing it to pass twice the length of the tubesbefore it escapes, which reversal is accomplished by passing the airthrough one part of the pipes, and then passing it back to the startingend through the other part or set of pipes. For the purpose of thuscausing the compressed air to pass twice through the tubes, a division,0, is placed in one end of the heater, thus dividing the tubes into twosets. Whether the compressed air is admitted from above or below, it canonly escape from the heater after twice traversing the length of thetubes, by which time the air will be almost as hot as the steam itself.Upon both the heater and the receiver will be placed a safety-valve, inorder to pre vent explosions.

The arrangement of the pipes for conveying the compressed air from theengine to the receiver, for the passage of the exhaust steam and of thecompressed air to the heater, may be a matter of choice, as they may bearranged in a number of different Ways.

The apparatus above described may be added to any steam -boiler which isnow being used for heating by steam.

Having thus described my invention, I claim- 1. In an apparatus forheating buildings by compressed air, the combination of a steam boiler,a receiver into which the air is com- 2 Sheets-Sheet 1. H. A. BUCK.Breech-Loading Fire-Arm. No'. 214,098.

Patented April 8, I879.

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NJETERS, FHOTO-LITHDGRAPHER. WASHINGFON, D C.

